期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 54, 期 18, 页码 5139-5148出版社
AMER CHEMICAL SOC
DOI: 10.1021/ie504786x
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资金
- National Natural Science Foundation of China [21306130]
- Major State Basic Research Development Program of China (973 Program) [2009CB623405]
- Science & Technology Pillar Program of Tianjin [10ZCKFSH01700]
- Program of Introducing Talents of Discipline to Universities [B06006]
In this work, imidazolate framework ZIF-8 nanoparticles were synthesized and incorporated into a poly(vinylamine) (PVAm) coating solution. The chemical structure of a PVAm/ZIF-8 film was characterized by X-ray diffraction and attenuated total reflectance Fourier transform infrared spectroscopy techniques. Mixed-matrix membranes (MMMs) were developed by coating the PVAm/ZIF-8 mixed dispersion on a polysulfone (PSf) support membrane. Surface and cross-sectional scanning electron microscopy images of the MMMs were employed to observe the dispersion of nanoparticles in the polymer matrix. The CO2 permeance and CO2/N-2 selectivity of the MMMs were evaluated by using a CO2/N-2 mixture gas. Optimal preparation parameters for the MMMs were achieved by varying the incorporated ZIF-8 contents in the coating solution and the wet coating thickness. The effect of incorporated ZIF-8 on improving the gas permselectivity was revealed, and the mechanism of CO2-facilitated transport in the PVAm/ZIF-8/PSf membrane was analyzed. The CO2/N-2 separation performance of PVAm/ZIF-8/PSf membranes with different wet coating thicknesses was also evaluated at 22-60 degrees C to analyze the changes of the gas permselectivity with increasing temperature.
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